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/sci/ Science & Math

Threads added between 2013/04/10 and 2013/04/17

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Most viewed threads in this category

14 more posts in this thread. [Missing image file: image002.jpg]
How would I find dy/dx when the equation is given as x=? Pic not related
4 more posts in this thread. [Missing image file: 1366020916800.jpg]
If the sun is 93 million miles away and the speed of light is 860,000 mph, how come when I look up I immeditaly see the sun and it doesnt take like 2 minutes?
1 more posts in this thread. [Missing image file: 14z0B.gif]
Anyone here good with quantum tunneling? I'm doing a practice problem for a test coming up. Not so good on the subject, and I can't find the work-through of this problem. keeping constant speed 0.8 m/s, a marble rolls back and forth inside a shoebox. Make an order-of-magnitude estimate of the probability of its escaping through the wall of the box by quantum tunneling. State the quantities you take as data and the values you measure or estimate for them Can someone point me in the right direction on how to set it up?

Engineering degree??

11 more posts in this thread. [Missing image file: image.jpg]
Hey /sci/, I am hoping I can get some honest opinions from someone on here with engineering degrees or someone currently working on a degree. I have some college credits, about 50 hours of mostly general education, however, it's been a good 15 years since I have been in school. Yeah, I'm kinda old. I don't have a strong mathematics background, but I was always very good at science and understanding abstract concepts. I should also point out I have been working as a BMW diagnostic technician for the last 16 years. So I do have a strong technical and mechanical background. Anyway, to the point. My dream is to become an engineer. Preferably mechanical engineering and possibly aeronautical engineering as a grad degree if all goes well. Am I delusional for thinking I can realistically do this at this point in my life? I know it's one of the toughest degree programs out there, but I really want it. I guess it's my lack of a strong mathematics background that has me worried. Thanks.

I think it's a cipher II

49 more posts in this thread. [Missing image file: DSC00729-2.jpg]
Okay, the old thread started going down so here's the new one. You can view the old thread online right here: https://archive.installgentoo.net/sci/thread/5684052 or download a ZIP file I prepared, containing the old thread in PDF format and with all full-size images included: http://www.megafileupload.com/en/file/412178/cipher-zip.html
246 more posts in this thread. [Missing image file: JPS.jpg]
Ask me about a math concept, and I will do my best to explain it. Picture related.
13 more posts in this thread. [Missing image file: hairlessmonkey.jpg]
>spend 12 years of my life home schooled >mom and dad teach me some basic math stuff, like finding the area of a triangle, addition +subtraction etc >ignore standards for math education. >go to community college, be tested, and be placed in pre-algebra class. >first semester everyone around me is a bumbling idiot, or an immigrant Kill me /sci/ My dreams of being a docter are crushed. I'm 18.
0 more posts in this thread. [Missing image file: Photo_00003.jpg]
Let g(x)=x/(x^2-1) Find the following: X Intercepts Y Intercepts Horizontal and Vertical Asymptotes The behavior of g(x) near vertical asymptotes Thanks /sci/, looking forward to learning.

Maximum procrastination

3 more posts in this thread. [Missing image file: 1358624109587.gif]
i'm taking an AI and object oriented programming course remotely this semester (working from home) this is my graduating semester i also need to fix up two Fs from a few semesters ago, one from a SQL databases class (final project basically exploded at the last minute, no credit) and one for a software engineering elective i have 17 days before i need to turn in all my work i have barely started on either class. at all. aside from reading a few chapters of the AI book you think YOU procrastinate?

Organic chem

3 more posts in this thread. [Missing image file: ss (2013-04-13 at 05.52.37).png]
Are there any chem gods on /sci/? I cannot for the life of my understand organic chem at all. If you could please give a good explanation I would be really grateful.
1 more posts in this thread. [Missing image file: cantevensitdown.gif]
I need to be able to complete the equation for the ionization of an Arrhenius acid (or base) in water, given just the acid or base and its state. I'm not going to post what the exact problems are because first, I don't want to get banned for asking you to do my homework for me, and second, I don't want you to do my homework for me; I'd just like some help in understanding -how- to do it. Could someone please walk me through this?
6 more posts in this thread. [Missing image file: 1357602359219.jpg]
>mfw people try to apply quantum mechanics to reality
0 more posts in this thread. [Missing image file: 590x393_04131348_page.jpg]
heads up
0 more posts in this thread. [Missing image file: 1.jpg]
Help me out with this one please? (2) You also need to order pipes for a new water distribution system that needs to carry a flow of 1000 gpm without exceeding pressure loss of 10 psi per mile of pipeline. What is the minimum pipe diameter you need to meet these criteria? Please show calculations and reasoning for those calculations.
6 more posts in this thread. [Missing image file: 1289025618794.jpg]
Anyone know if Biostatistics is a good field to go into? Just a confused math major here with an interest in bio worrying about the future.
3 more posts in this thread. [Missing image file: roll and flip.gif]
What do you think of the Crash Course Chemistry series? http://www.youtube.com/watch?v=FSyAehMdpyI Starts off very, VERY basic but does expand quite a bit on that throughout the series.
0 more posts in this thread. [Missing image file: Astronaut.jpg]
http://www.cs.amherst.edu/~djv/irs.pdf 9:Amount from line 2. 10: Multiply line 2 by line 5.
3 more posts in this thread. [Missing image file: staticjpg.jpg]
In the old days (e.g. the in the middle ages), how did people explain static electricity? I don't mean the scientists of the time, who at least had some theories about it. I'm more interested to know what the average person's understanding of it was. Say, a farmer comes home and takes of his sweater or something and sees flashes of light.
4 more posts in this thread. [Missing image file: jackfruit_thailand_view1.jpg]
Having a bit of a problem with this multivariable analysis. U = (0,1)^3, phi takes U into R^4 and is C^1 bd phi (U) = phi bd (U) f takes phi (cl U) into R and is C^1 We're supposed to show: $\int_{\partial \phi (U)} f dx_1 \wedge dx_2 = \int_{\phi(U)} \partial_3 f dx_3 \wedge dx_1 \wedge dx_2 + \int_{\phi(U)} \partial_4 f dx_4 \wedge dx_1 \wedge dx_2 $ [\math] I am really stuck, any advice? I've been messing around with pullbacks and partials for hours now and am getting lost.
2 more posts in this thread. [Missing image file: 1360615103646.jpg]
Can a Benign Tumor in the rib cage region (lower left) trick the immune system into attacking itself; and thus attacking the intestines leading to a Crohn's Disease-like illness? If not, I also read that a benign tumor can constrict surrounding tissues and blood vessels. If it restricts the blood vessels, which would restrict the flow of blood in the abdomen. It would ultimately impair the digestion of food. Could this in result mimic Crohn's Disease behavior? (Blood in stool/little appetite/problem going to the bathroom/pain in stomach, etc) I'll ask a doctor; but I want to ask you guys too. I had a benign tumor at the end of junior high in my left lower rib cage. The expert told me that I should go to the gym and work out; which should lessen/make the tumor less present/severe as it was. Within 6 months after graduating and the diagnosis in junior high, I started as a Freshman in Highschool around September and suffered severe intense 100/100 pain in my abdomen with blood in stool and no appetite. After many hijinks while as a Freshman; I was diagnosed with Crohns. My symptoms and "illness" is definitely Crohns; no doubt about it. But its very weird that I'd get something like this after having a tumor within 1 fucking year. Being the lower class background I'm in, I have bad parents and lived in a bad household (never slept on a bed, only couch, lower income single parent, asbestos like walls peeling and burned, etc). If it matters; While in Junior High I occasionally burned my rice-meal when coming from school; and ate it (I have a phobia of fire due to an incident as a toddler). Sometimes I ate it, sometimes I threw it away. I'm in 21 and in college right now and even though I'm taking meds for my auto-immune disease (works 50/50), I never went to check up again for my benign tumor. I was wondering hopelessly and naively, if this Auto-immune Crohn's disease is from the tumor or legit Help/advice/theories pls?






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